Necromancer received an update. Base mechanics are cool but base deck seems lacking in power, so you definitely need to rush the main skill upgrade - you get 4 choices and they are awesome!

Base Skill:

• Exiling any cards get you a necromancer point (like Wizard points)

• Removing any card will deal 1 damage per necromancer point (this includes playing cards with Remove)

• Base Deck

  -Undead Army Fighter: Deal 4 damage. Gain 3 shield. Duplicate. Exile.

-Banshee: Remove a card from exile. Apply 1 weak to all enemies.

• Skill upgrades I'm currently trying the Flesh upgrade, which changes your base deck and is very much worth it.

Mace Skeleton (replaces Undead Army Fighter): Deal 6 damage. Gain 4 shield. Duplicate. Exile. If you remove this card from the game, you heal 2.

Abominium (key card): like Banshee, but apply 3 weak and 3 poison

Upgrades

https://m.imgur.com/a/isx4sD6